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CurrentINTERNET STANDARDIETF streamSTD7

RFC 9293: Transmission Control Protocol (TCP)

In plain English — editorial summary, not part of the RFC

This document specifies the Transmission Control Protocol (TCP). TCP is an important transport-layer protocol in the Internet protocol stack, and it has continuously evolved over decades of use and growth of the Internet. Over this time, a number of changes have been made to TCP as it was specified in RFC 793, though these have only been documented in a piecemeal fashion. This document collects and brings those changes together with the protocol specification from RFC 793. This document obsoletes RFC 793, as well as RFCs 879, 2873, 6093, 6429, 6528, and 6691 that updated parts of RFC 793. It updates RFCs 1011 and 1122, and it should be considered as a replacement for the portions of those documents dealing with TCP requirements. It also updates RFC 5961 by adding a small clarification in reset handling while in the SYN-RECEIVED state. The TCP header control bits from RFC 793 have also been updated based on RFC 3168.

Document record

Document ID
RFC9293
Published
August 2022
Authors
W. Eddy
Status
INTERNET STANDARD
Stream
IETF
Area
wit
Pages
98
Also known as
STD7
Obsoletes:
RFC 793, RFC 879, RFC 2873, RFC 6093, RFC 6429, RFC 6528, RFC 6691
Updates:
RFC 1011, RFC 1122, RFC 5961

Standards lineage

This document is one revision in a chain of 18 RFCs, each formally replacing the one before it.

  1. RFC 675 (1974)
  2. RFC 721 (1976)
  3. RFC 761 (1980)
  4. RFC 793 (1981)
  5. RFC 813 (1982)
  6. RFC 816 (1982)
  7. RFC 879 (1983)
  8. RFC 896 (1984)
  9. RFC 1078 (1988)
  10. RFC 1948 (1996)
  11. RFC 2873 (2000)
  12. RFC 6013 (2011)
  13. RFC 6093 (2011)
  14. RFC 6429 (2011)
  15. RFC 6528 (2012)
  16. RFC 6691 (2012)
  17. RFC 7805 (2016)
  18. RFC 9293 (2022)

Read the full history of Transmission Control Protocol (TCP) →

Related documents

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About this page

The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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canonical URL: /rfc/9293-transmission-control-protocol-tcp